[Bug 77908] [IVB Bisected]Subcases dpms-vs-vblank-race-interruptible and modeset-vs-vblank-race of kms_flip fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77908

--- Comment #7 from Guo Jinxian <jinxianx.guo at intel.com> ---
SNB has this issue too

./kms_flip --run-subtest modeset-vs-vblank-race-interruptible
IGT-Version: 1.6-g8741c22 (x86_64) (Linux:
3.15.0-rc3_drm-intel-fixes_e4c610_20140509+ x86_64)
Using monotonic timestamps
Beginning modeset-vs-vblank-race-interruptible on crtc 5, connector 21
  1920x1200 60 1920 1968 2000 2080 1200 1203 1209 1235 0x9 0x40 154000
...........
modeset-vs-vblank-race-interruptible on crtc 5, connector 21: PASSED

Beginning modeset-vs-vblank-race-interruptible on crtc 8, connector 21
  1920x1200 60 1920 1968 2000 2080 1200 1203 1209 1235 0x9 0x40 154000
Test assertion failure function run_test_step, file kms_flip.c:873:
Last errno: 22, Invalid argument
Failed assertion: __wait_for_vblank(TEST_VBLANK_BLOCK, o->pipe, 1, 0, &reply)
== 0
Subtest modeset-vs-vblank-race-interruptible: FAIL

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